Playback loops when transcoding on Android Client

[jordiep23]

Server Info- TrueNAS Scale 25.04.1 with Jellyfin 10.10.7.

Client Info- Android Client 2.6.3

Playback is stuck in a 3 second loop when trying to transcode at 1.5Mbps on my Android phone. The video plays for 3 seconds and displays the videos loading image before resuming for 3 seconds.
This issue persists once transcoding has reached 100%.
The issue occurs on local network and 'remote' access via Tailscale
Occurs on all videos.
Direct play and other quality bitrates do not produce this issue.
This issue does not occur when using Jellyfin Media Player 1.12.0 on Windows with the same file and transcode quality.

I have successfully transcoded to 1.5Mbps using this client before. 

I have tried Positive Power Interuption on the server and client.

I have attached the transcode log. 
  Transcode 1.5MbpsLoop.txt (Size: 84.04 KB / Downloads: 8)

Any thoughts on this would be appreciated.

[seemebreakthis]

Same here. Things were ok before.

Exact same symptoms. Problem with android clients only.

[Bladefin]

I had noticed this on Tuesday with the web player it loops every 3 seconds so never actually playing the film.

[seemebreakthis]

I did some more testing and it seems the client player on my Android phone just keeps storing transcoded data which makes the buffer grow uncontrolled, until the old data that gets deleted actually reaches the current playback location, at which point playback is interrupted and then starts over from the beginning of the video.

This is only my conjecture, but it does seem when the buffered data grows to a certain extent, as can be seen in my playback timeline, the playback gets interrupted.

Seems the web player client doesn't know how to tell the server to pause transcoding as the buffer is getting filled up.

Funny thing is, on another Android phone running the exact same version of the Jellyfin client, this problem doesn't show. That phone seems to be able to tell the server to throttle transcodes properly, and the timeline shows buffering to stop growing after it gets far ahead enough. So the problem only manifests itself on my main phone.

[nyanmisaka]

Chrome 138 regression, fixed in: https://github.com/jellyfin/jellyfin-web/pull/6985

[seemebreakthis]

Thanks !!

So.... need to wait for 10.11.0 release?

[Kessl]

I have the same problem, though it is not exactly 3 seconds for me.
Android client 2.6.3 on a Samsung tablet with Android 15. Same client version on a Pixel 9 phone (Android 16) runs flawless, also several Windows and Linux apps don't show this error. On the Tablet that shows the error only video playback is affected, music has no problems. Lastly, playback on the tablet using Firefox also works, so I guess the problem must be something very specific with the app.
What I tried so far: Login as another user, did not help. Delete the Cache, did not help. Delete and reinstall the app, did not work. I switches all things in the options, tried different audio languages, bitrates and subtitles, nothing changes.
/edit: I take it back, on my Pixel 9 phone it takes about 30 min until the video loops back to where playback started. The problem seems to be client 2.6.3. Please reroll the playstore to an earlier version.